The mother often tells her son to be a good boy warning him to trouble.A. hold back fro

问题补充：

The mother often tells her son to be a good boy, warning him to trouble.

A. hold back from

B. keep out of

C. break away from

D. get rid of

答案：

A. hold back from

(答案→)B. keep out of

C. break away from

D. get rid of

解析：hold back from 意为“向……隐瞒”；keep out of 意为“使在……之外”；break away from 意为“脱离”；get rid of 意为“摆脱，消除，去掉”。